kdc/mit_dump.c

   1 /*
   2  * Copyright (c) 2000 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "hprop.h"
  35
  36 /*
  37 can have any number of princ stanzas.
  38 format is as follows (only \n indicates newlines)
  39 princ\t%d\t (%d is KRB5_KDB_V1_BASE_LENGTH, always 38)
  40 %d\t (strlen of principal e.g. shadow/foo@ANDREW.CMU.EDU)
  41 %d\t (number of tl_data)
  42 %d\t (number of key data, e.g. how many keys for this user)
  43 %d\t (extra data length)
  44 %s\t (principal name)
  45 %d\t (attributes)
  46 %d\t (max lifetime, seconds)
  47 %d\t (max renewable life, seconds)
  48 %d\t (expiration, seconds since epoch or 2145830400 for never)
  49 %d\t (password expiration, seconds, 0 for never)
  50 %d\t (last successful auth, seconds since epoch)
  51 %d\t (last failed auth, per above)
  52 %d\t (failed auth count)
  53 foreach tl_data 0 to number of tl_data - 1 as above
  54   %d\t%d\t (data type, data length)
  55   foreach tl_data 0 to length-1
  56     %02x (tl data contents[element n])
  57   except if tl_data length is 0
  58     %d (always -1)
  59   \t
  60 foreach key 0 to number of keys - 1 as above
  61   %d\t%d\t (key data version, kvno)
  62   foreach version 0 to key data version - 1 (a key or a salt)
  63     %d\t%d\t(data type for this key, data length for this key)
  64     foreach key data length 0 to length-1
  65       %02x (key data contents[element n])
  66     except if key_data length is 0
  67       %d (always -1)
  68     \t
  69 foreach extra data length 0 to length - 1
  70   %02x (extra data part)
  71 unless no extra data
  72   %d (always -1)
  73 ;\n
  74
  75 */
  76
  77 static int
  78 hex_to_octet_string(const char *ptr, krb5_data *data)
  79 {
  80     int i;
  81     unsigned int v;
  82     for(i = 0; i < data->length; i++) {
  83         if(sscanf(ptr + 2 * i, "%02x", &v) != 1)
  84             return -1;
  85         ((unsigned char*)data->data)[i] = v;
  86     }
  87     return 2 * i;
  88 }
  89
  90 static char *
  91 nexttoken(char **p)
  92 {
  93     char *q;
  94     do {
  95         q = strsep(p, " \t");
  96     } while(q && *q == '\0');
  97     return q;
  98 }
  99
 100 static size_t
 101 getdata(char **p, unsigned char *buf, size_t len)
 102 {
 103     size_t i;
 104     int v;
 105     char *q = nexttoken(p);
 106     i = 0;
 107     while(*q && i < len) {
 108         if(sscanf(q, "%02x", &v) != 1)
 109             break;
 110         buf[i++] = v;
 111         q += 2;
 112     }
 113     return i;
 114 }
 115
 116 static int
 117 getint(char **p)
 118 {
 119     int val;
 120     char *q = nexttoken(p);
 121     sscanf(q, "%d", &val);
 122     return val;
 123 }
 124
 125 #include <kadm5/admin.h>
 126
 127 static void
 128 attr_to_flags(unsigned attr, HDBFlags *flags)
 129 {
 130     flags->postdate =           !(attr & KRB5_KDB_DISALLOW_POSTDATED);
 131     flags->forwardable =        !(attr & KRB5_KDB_DISALLOW_FORWARDABLE);
 132     flags->initial =           !!(attr & KRB5_KDB_DISALLOW_TGT_BASED);
 133     flags->renewable =          !(attr & KRB5_KDB_DISALLOW_RENEWABLE);
 134     flags->proxiable =          !(attr & KRB5_KDB_DISALLOW_PROXIABLE);
 135     /* DUP_SKEY */
 136     flags->invalid =           !!(attr & KRB5_KDB_DISALLOW_ALL_TIX);
 137     flags->require_preauth =   !!(attr & KRB5_KDB_REQUIRES_PRE_AUTH);
 138     flags->require_hwauth =    !!(attr & KRB5_KDB_REQUIRES_HW_AUTH);
 139     flags->server =             !(attr & KRB5_KDB_DISALLOW_SVR);
 140     flags->change_pw =         !!(attr & KRB5_KDB_PWCHANGE_SERVICE);
 141     flags->client =             1; /* XXX */
 142 }
 143
 144 #define KRB5_KDB_SALTTYPE_NORMAL        0
 145 #define KRB5_KDB_SALTTYPE_V4            1
 146 #define KRB5_KDB_SALTTYPE_NOREALM       2
 147 #define KRB5_KDB_SALTTYPE_ONLYREALM     3
 148 #define KRB5_KDB_SALTTYPE_SPECIAL       4
 149 #define KRB5_KDB_SALTTYPE_AFS3          5
 150
 151 static krb5_error_code
 152 fix_salt(krb5_context context, hdb_entry *ent, int key_num)
 153 {
 154     krb5_error_code ret;
 155     Salt *salt = ent->keys.val[key_num].salt;
 156     /* fix salt type */
 157     switch((int)salt->type) {
 158     case KRB5_KDB_SALTTYPE_NORMAL:
 159         salt->type = KRB5_PADATA_PW_SALT;
 160         break;
 161     case KRB5_KDB_SALTTYPE_V4:
 162         krb5_data_free(&salt->salt);
 163         salt->type = KRB5_PADATA_PW_SALT;
 164         break;
 165     case KRB5_KDB_SALTTYPE_NOREALM:
 166     {
 167         size_t len;
 168         int i;
 169         char *p;
 170
 171         len = 0;
 172         for (i = 0; i < ent->principal->name.name_string.len; ++i)
 173             len += strlen(ent->principal->name.name_string.val[i]);
 174         ret = krb5_data_alloc (&salt->salt, len);
 175         if (ret)
 176             return ret;
 177         p = salt->salt.data;
 178         for (i = 0; i < ent->principal->name.name_string.len; ++i) {
 179             memcpy (p,
 180                     ent->principal->name.name_string.val[i],
 181                     strlen(ent->principal->name.name_string.val[i]));
 182             p += strlen(ent->principal->name.name_string.val[i]);
 183         }
 184
 185         salt->type = KRB5_PADATA_PW_SALT;
 186         break;
 187     }
 188     case KRB5_KDB_SALTTYPE_ONLYREALM:
 189         krb5_data_free(&salt->salt);
 190         ret = krb5_data_copy(&salt->salt,
 191                              ent->principal->realm,
 192                              strlen(ent->principal->realm));
 193         if(ret)
 194             return ret;
 195         salt->type = KRB5_PADATA_PW_SALT;
 196         break;
 197     case KRB5_KDB_SALTTYPE_SPECIAL:
 198         salt->type = KRB5_PADATA_PW_SALT;
 199         break;
 200     case KRB5_KDB_SALTTYPE_AFS3:
 201         krb5_data_free(&salt->salt);
 202         ret = krb5_data_copy(&salt->salt,
 203                        ent->principal->realm,
 204                        strlen(ent->principal->realm));
 205         if(ret)
 206             return ret;
 207         salt->type = KRB5_PADATA_AFS3_SALT;
 208         break;
 209     default:
 210         abort();
 211     }
 212     return 0;
 213 }
 214
 215 int
 216 mit_prop_dump(void *arg, const char *file)
 217 {
 218     krb5_error_code ret;
 219     char line [2048];
 220     FILE *f;
 221     int lineno = 0;
 222     struct hdb_entry_ex ent;
 223
 224     struct prop_data *pd = arg;
 225
 226     f = fopen(file, "r");
 227     if(f == NULL)
 228         return errno;
 229
 230     while(fgets(line, sizeof(line), f)) {
 231         char *p = line, *q;
 232
 233         int i;
 234
 235         int num_tl_data;
 236         int num_key_data;
 237         int high_kvno;
 238         int attributes;
 239
 240         int tmp;
 241
 242         lineno++;
 243
 244         memset(&ent, 0, sizeof(ent));
 245
 246         q = nexttoken(&p);
 247         if(strcmp(q, "kdb5_util") == 0) {
 248             int major;
 249             q = nexttoken(&p); /* load_dump */
 250             if(strcmp(q, "load_dump"))
 251                 errx(1, "line %d: unknown version", lineno);
 252             q = nexttoken(&p); /* load_dump */
 253             if(strcmp(q, "version"))
 254                 errx(1, "line %d: unknown version", lineno);
 255             q = nexttoken(&p); /* x.0 */
 256             if(sscanf(q, "%d", &major) != 1)
 257                 errx(1, "line %d: unknown version", lineno);
 258             if(major != 4 && major != 5 && major != 6)
 259                 errx(1, "unknown dump file format, got %d, expected 4-6",
 260                      major);
 261             continue;
 262         } else if(strcmp(q, "policy") == 0) {
 263             continue;
 264         } else if(strcmp(q, "princ") != 0) {
 265             warnx("line %d: not a principal", lineno);
 266             continue;
 267         }
 268         tmp = getint(&p);
 269         if(tmp != 38) {
 270             warnx("line %d: bad base length %d != 38", lineno, tmp);
 271             continue;
 272         }
 273         nexttoken(&p); /* length of principal */
 274         num_tl_data = getint(&p); /* number of tl-data */
 275         num_key_data = getint(&p); /* number of key-data */
 276         getint(&p);  /* length of extra data */
 277         q = nexttoken(&p); /* principal name */
 278         krb5_parse_name(pd->context, q, &ent.entry.principal);
 279         attributes = getint(&p); /* attributes */
 280         attr_to_flags(attributes, &ent.entry.flags);
 281         tmp = getint(&p); /* max life */
 282         if(tmp != 0) {
 283             ALLOC(ent.entry.max_life);
 284             *ent.entry.max_life = tmp;
 285         }
 286         tmp = getint(&p); /* max renewable life */
 287         if(tmp != 0) {
 288             ALLOC(ent.entry.max_renew);
 289             *ent.entry.max_renew = tmp;
 290         }
 291         tmp = getint(&p); /* expiration */
 292         if(tmp != 0 && tmp != 2145830400) {
 293             ALLOC(ent.entry.valid_end);
 294             *ent.entry.valid_end = tmp;
 295         }
 296         tmp = getint(&p); /* pw expiration */
 297         if(tmp != 0) {
 298             ALLOC(ent.entry.pw_end);
 299             *ent.entry.pw_end = tmp;
 300         }
 301         nexttoken(&p); /* last auth */
 302         nexttoken(&p); /* last failed auth */
 303         nexttoken(&p); /* fail auth count */
 304         for(i = 0; i < num_tl_data; i++) {
 305             unsigned long val;
 306             int tl_type, tl_length;
 307             unsigned char *buf;
 308             krb5_principal princ;
 309
 310             tl_type = getint(&p); /* data type */
 311             tl_length = getint(&p); /* data length */
 312
 313 #define mit_KRB5_TL_LAST_PWD_CHANGE     1
 314 #define mit_KRB5_TL_MOD_PRINC           2
 315             switch(tl_type) {
 316             case mit_KRB5_TL_LAST_PWD_CHANGE:
 317                 buf = malloc(tl_length);
 318                 if (buf == NULL)
 319                     errx(ENOMEM, "malloc");
 320                 getdata(&p, buf, tl_length); /* data itself */
 321                 val = buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
 322                 free(buf);
 323                 ALLOC(ent.entry.extensions);
 324                 ALLOC_SEQ(ent.entry.extensions, 1);
 325                 ent.entry.extensions->val[0].mandatory = 0;
 326                 ent.entry.extensions->val[0].data.element
 327                     = choice_HDB_extension_data_last_pw_change;
 328                 ent.entry.extensions->val[0].data.u.last_pw_change = val;
 329                 break;
 330             case mit_KRB5_TL_MOD_PRINC:
 331                 buf = malloc(tl_length);
 332                 if (buf == NULL)
 333                     errx(ENOMEM, "malloc");
 334                 getdata(&p, buf, tl_length); /* data itself */
 335                 val = buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
 336                 ret = krb5_parse_name(pd->context, (char *)buf + 4, &princ);
 337                 if (ret)
 338                     krb5_err(pd->context, 1, ret,
 339                              "parse_name: %s", (char *)buf + 4);
 340                 free(buf);
 341                 ALLOC(ent.entry.modified_by);
 342                 ent.entry.modified_by->time = val;
 343                 ent.entry.modified_by->principal = princ;
 344                 break;
 345             default:
 346                 nexttoken(&p);
 347                 break;
 348             }
 349         }
 350         ALLOC_SEQ(&ent.entry.keys, num_key_data);
 351         high_kvno = -1;
 352         for(i = 0; i < num_key_data; i++) {
 353             int key_versions;
 354             int kvno;
 355             key_versions = getint(&p); /* key data version */
 356             kvno = getint(&p);
 357
 358             /*
 359              * An MIT dump file may contain multiple sets of keys with
 360              * different kvnos.  Since the Heimdal database can only represent
 361              * one kvno per principal, we only want the highest set.  Assume
 362              * that set will be given first, and discard all keys with lower
 363              * kvnos.
 364              */
 365             if (kvno > high_kvno && high_kvno != -1)
 366                 errx(1, "line %d: high kvno keys given after low kvno keys",
 367                      lineno);
 368             else if (kvno < high_kvno) {
 369                 nexttoken(&p); /* key type */
 370                 nexttoken(&p); /* key length */
 371                 nexttoken(&p); /* key */
 372                 if (key_versions > 1) {
 373                     nexttoken(&p); /* salt type */
 374                     nexttoken(&p); /* salt length */
 375                     nexttoken(&p); /* salt */
 376                 }
 377                 ent.entry.keys.len--;
 378                 continue;
 379             }
 380             ent.entry.kvno = kvno;
 381             high_kvno = kvno;
 382             ALLOC(ent.entry.keys.val[i].mkvno);
 383             *ent.entry.keys.val[i].mkvno = 1;
 384
 385             /* key version 0 -- actual key */
 386             ent.entry.keys.val[i].key.keytype = getint(&p); /* key type */
 387             tmp = getint(&p); /* key length */
 388             /* the first two bytes of the key is the key length --
 389                skip it */
 390             krb5_data_alloc(&ent.entry.keys.val[i].key.keyvalue, tmp - 2);
 391             q = nexttoken(&p); /* key itself */
 392             hex_to_octet_string(q + 4, &ent.entry.keys.val[i].key.keyvalue);
 393
 394             if(key_versions > 1) {
 395                 /* key version 1 -- optional salt */
 396                 ALLOC(ent.entry.keys.val[i].salt);
 397                 ent.entry.keys.val[i].salt->type = getint(&p); /* salt type */
 398                 tmp = getint(&p); /* salt length */
 399                 if(tmp > 0) {
 400                     krb5_data_alloc(&ent.entry.keys.val[i].salt->salt, tmp - 2);
 401                     q = nexttoken(&p); /* salt itself */
 402                     hex_to_octet_string(q + 4,
 403                                         &ent.entry.keys.val[i].salt->salt);
 404                 } else {
 405                     ent.entry.keys.val[i].salt->salt.length = 0;
 406                     ent.entry.keys.val[i].salt->salt.data = NULL;
 407                     getint(&p); /* -1, if no data. */
 408                 }
 409                 fix_salt(pd->context, &ent.entry, i);
 410             }
 411         }
 412         nexttoken(&p); /* extra data */
 413         v5_prop(pd->context, NULL, &ent, arg);
 414     }
 415     fclose(f);
 416     return 0;
 417 }